Manufacture of staples



no Model.)

- C. W. DEAN.

\ Manufacture of Staples. .No. 239,737. "Patented April 5,1881. 2 23-KZZ//////////V/'//'/// ///A WITNESSES;

- INVBNTQRQ Unrran STATES PATENT Guinea.

CHARLES W. DEAN, OF SOUTH WAREHAM, MASSACHUSETTS.

MANUFACTURE OF STAPLES.

SPECIFICATION formingpart of Letters Patent No. 239,737, dated April 5,188 1.

Application filed December I0, 1880. (No model.)

To all whom it may concern:

Be it known that l, CHARLES W. DEAN, of South Warcham, in the county ofPlymouth and State of Massachusetts, have invented certain new anduseful Improvements in the Manufacture ofStaples, of which the followingis aspecification.

My invention applies more especially to the manufacture ofsmall staplesor double-pointed tacks for fastening carpets, or for other purposes,but may be also applied to staples of any of the usual sizes for commonuses.

My invention aims to form staples from bars of metal in lieu of wire, asheretofore, in .a more rapid and economical manner, and which will alsoinsure certain advantageous qualities in the staples.

To this end the chief feature of my invention, briefly stated, consistsin forming staples by cutting them successively from bars ofmetal inaform approximating to theirfinished shape, with their legs diverging,and then bending these legs parallel, or nearly so, to complete thestaple, as hereinafter fully set forth.

Figures 1 and 5 of the annexed drawings present cross-sections of metalbars of suita ble shape for the manufacture of myimproved staples. Figs.2 and 6 present face views of said bars having several successivetransverse cuts made on the end thereof in the proximate form ofstaples. Figs. 3 and 7 represent, respectively, one of these cuts orsections detached, forming approximate or rudimentary staples. Figs. 4and 8 represent the same with their legs bent parallel, or nearly so,forming-the completed staple. Figs. 9, 10,11, and 12 representperspective cross-sectional views of bars of various forms with sharpedges, for the manufacture of the staples, in lieu of the square-edgedbars shown in Figs. 1 and 5.

Similar letters of reference sponding parts.

From the above introduction it will'now be readily understood that tomanufacture my improved staples 1 first prepare bars or narrow plates ofwrought iron or steel or other metal, of preferably great lengthcompared with their width, and of any suitable cross-section, eitherplain rectangular bars, as shown in Figs. 1 and 5, or various prismaticforms, with sharp or beveled edges, as shown in Figs.

indicate corre- 9, 10, 11, and 12. These bars or blanks are then cut upfrom one end into a series of forked sections, so that no waste of metalwhatever results, as indicated by a a gg in Figs. 2 and 4 and 8, theprocess being very rapid and simple. .In these drawings I have shown twoslightly different forms of staples, the one being of angular V form,while the other is of curved crescent shape; but in both cases it willbe observed that the staples are cut at one action from it metal bars intheir approximate shape, with their legs diverging, and that these legsare afterward bent parallel to complete the staple; but I do not,however, confine myself to these special shapes, nor to any specialshape of staple produced according to this system, for obviously theshapes may vary considerably Without departing from this system ofmanufacture.

It will be observed that the angle at which the divergent legs of thestaple-cuts approach the sides of the blank bar causes the desired acuteangle to be produced at the enteringpoints of the staple, as indicatedat f f and t; t'in -Figs. 3 and 7; and it'will be further observed thatthis system of cutting the staples in their'divcrgent or approximateshape from the bar enables one cut to closely succeed the other, whereaswere the staples to be out into their completed shape from the bars, notonly would the die or cutters have greater work to perform, but greaterwaste of metal would result.

It will be observed that the angular form of staple shown in the leftcolumn in the drawings, when complete, will have a flat head, I),sloping shoulders c a, straight parallel legs d d, and points f f,beveled on the outside, while the curved staple shown on the rightcolumn will have a round head, h, and legs t tapering to points, each ofwhich forms will have particular advantages for certain purposes. It maybe also noted that when the staples are cut from plain rectangular bars,as shown in the first figures, the staple-points will not taper on thebroad sides; but when out from bars with beveled edges, as in Figs. 9,10, 11, and 12 the points will also taper on one or more sides, thusbecoming more insinuating and easier to drive, while the head will bequite broad, to better receive the blows of the hammer and take a wideand firm bearing on the carpet or other article against which it may bedriven.

It may now be observed that not only is this mode of manufacturingstaples very rapid and simple, but very economical of metal, andprodncesthe staple in complete form with very few operations, and thoseof a direct kind, and without much bending or displacing of the fiber ofthe metal. Furthermore, as these staples are entirely out from bars ofmetal they will possess a toughness and stiffness which will render themdifficult to bend or break in driving or withdrawing, and thus renderboth operations more easy than is the case with bendable wire staples.Moreover, the sharp cut and burred faces of the staples will give 2. Astaple cut in one piece from bar metal, I

and having a flat head, I), sloping shoulders 0 c, and parallel legs dd, substantially as herein shown and described.

CHARLES WARREN DEAN.

Vitnesses:

JAMES G. SPROAT, EDGAR ROBINSON.

